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yann@1948
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diff -durN gcc-4.4.0.orig/gcc/c-common.c gcc-4.4.0/gcc/c-common.c
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yann@1948
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yann@1948
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diff -durN gcc-4.4.4.orig/gcc/c-common.c gcc-4.4.4/gcc/c-common.c
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--- gcc-4.4.4.orig/gcc/c-common.c 2009-11-05 15:57:57.000000000 +0100
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yann@1948
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+++ gcc-4.4.4/gcc/c-common.c 2010-05-16 19:11:21.000000000 +0200
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@@ -301,7 +301,7 @@
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/* Warn about format/argument anomalies in calls to formatted I/O functions
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(*printf, *scanf, strftime, strfmon, etc.). */
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-int warn_format;
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+int warn_format = 1;
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/* Warn about using __null (as NULL in C++) as sentinel. For code compiled
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with GCC this doesn't matter as __null is guaranteed to have the right
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diff -durN gcc-4.4.4.orig/gcc/c.opt gcc-4.4.4/gcc/c.opt
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--- gcc-4.4.4.orig/gcc/c.opt 2009-09-18 23:53:23.000000000 +0200
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+++ gcc-4.4.4/gcc/c.opt 2010-05-16 19:11:21.000000000 +0200
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@@ -236,7 +236,7 @@
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Warn about format strings that contain NUL bytes
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yann@1948
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Wformat-security
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yann@1948
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-C ObjC C++ ObjC++ Var(warn_format_security) Warning
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+C ObjC C++ ObjC++ Var(warn_format_security) Init(1) Warning
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Warn about possible security problems with format functions
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yann@1948
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Wformat-y2k
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diff -durN gcc-4.4.4.orig/gcc/doc/invoke.texi gcc-4.4.4/gcc/doc/invoke.texi
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--- gcc-4.4.4.orig/gcc/doc/invoke.texi 2010-04-08 12:46:46.000000000 +0200
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+++ gcc-4.4.4/gcc/doc/invoke.texi 2010-05-16 19:11:21.000000000 +0200
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@@ -2888,6 +2888,9 @@
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yann@1948
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@option{-Wformat-nonliteral}, @option{-Wformat-security}, and
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@option{-Wformat=2} are available, but are not included in @option{-Wall}.
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+NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++.
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+To disable, use @option{-Wformat=0}.
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+
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@item -Wformat-y2k
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@opindex Wformat-y2k
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@opindex Wno-format-y2k
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@@ -2941,6 +2944,11 @@
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in future warnings may be added to @option{-Wformat-security} that are not
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included in @option{-Wformat-nonliteral}.)
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yann@1948
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yann@1948
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+NOTE: In Gentoo, this option is enabled by default for C, C++, ObjC, ObjC++.
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yann@1948
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+To disable, use @option{-Wno-format-security}, or disable all format warnings
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+with @option{-Wformat=0}. To make format security warnings fatal, specify
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+@option{-Werror=format-security}.
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+
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@item -Wformat=2
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@opindex Wformat=2
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yann@1948
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@opindex Wno-format=2
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